Geoconnex alignment recommendations

Metadata

IRI: https://geoconnex.us/def/geoconnex-alignment
Title: Geoconnex alignment recommendations
Date Created: 2026-06-02
Description: Recommended RDFS/OWL alignment axioms for an incomplete inventory of Geoconnex graph classes and properties. The ontology aligns hydrologic features with SawGraph/HY_Features, spatial descriptions with GeoSPARQL and Simple Features, web discovery metadata with Schema.org and DCAT, and observations/quantities with SOSA/SSN and QUDT.
Imports: http://purl.org/spatialai/spatial/water-full

Classes

Class Hierarchy

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Class Definitions

Government Organization ^c

IRI	`https://schema.org/GovernmentOrganization`
Sub Class Of	schema:Organization ^c
In Range Of	schema:governmentAgency ^op

Organization ^c

IRI	`https://schema.org/Organization`
Sub Class Of	schema:Thing
Super Class Of	schema:GovernmentOrganization ^c

Person ^c

IRI	`https://schema.org/Person`
Sub Class Of	schema:Thing

Search Action ^c

IRI	`https://schema.org/SearchAction`
Sub Class Of	schema:Action

Entry Point ^c

IRI	`https://schema.org/EntryPoint`
Sub Class Of	schema:Intangible

Image Object ^c

IRI	`https://schema.org/ImageObject`
Sub Class Of	schema:MediaObject

Breadcrumb List ^c

IRI	`https://schema.org/BreadcrumbList`
Sub Class Of	schema:ItemList

List Item ^c

IRI	`https://schema.org/ListItem`
Sub Class Of	schema:Intangible

Web Site ^c

IRI	`https://schema.org/WebSite`
Sub Class Of	schema:CreativeWork

Web Page ^c

IRI	`https://schema.org/WebPage`
Sub Class Of	schema:CreativeWork

News Article ^c

IRI	`https://schema.org/NewsArticle`
Sub Class Of	schema:Article

Property ^c

IRI	`http://www.w3.org/1999/02/22-rdf-syntax-ns#Property`
Super Class Of	ContainerMembershipProperty ^c

Datatype ^c

IRI	`http://www.w3.org/2000/01/rdf-schema#Datatype`
Sub Class Of	Class ^c

Class ^c

IRI	`http://www.w3.org/2000/01/rdf-schema#Class`
Super Class Of	Datatype ^c

Container Membership Property ^c

IRI	`http://www.w3.org/2000/01/rdf-schema#ContainerMembershipProperty`
Sub Class Of	Property ^c

List ^c

IRI	`http://www.w3.org/1999/02/22-rdf-syntax-ns#List`

Transitive Property ^c

IRI	`http://www.w3.org/2002/07/owl#TransitiveProperty`
Sub Class Of	ObjectProperty

Symmetric Property ^c

IRI	`http://www.w3.org/2002/07/owl#SymmetricProperty`
Sub Class Of	ObjectProperty

Hy_Hydrographic Network ^c

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/HY_HydrographicNetwork`
Sub Class Of	hyf:HY_HydroFeature
Super Class Of	hyf:HY_HydrometricNetwork

Measured Variable ^c

IRI	`https://geoconnex.us/def/MeasuredVariable`
In Range Of	variableMeasured ^op

Hy_Indirect Position ^c

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/HY_IndirectPosition`
In Domain Of	hyf:interpolative ^dp hyf:linearElement ^op hyf:distanceDescription ^op

Hy_Distance From Referent ^c

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/HY_DistanceFromReferent`
In Range Of	hyf:distanceExpression ^op

Hy_Distance Description ^c

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/HY_DistanceDescription`
In Domain Of	hyf:distanceExpression ^op
In Range Of	hyf:distanceDescription ^op

Object Properties

Object Property Hierarchy

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Object Property Definitions

logo ^op

IRI	`https://schema.org/logo`
Range	schema:ImageObject ^c or Resource ^c

government agency ^op

IRI	`https://schema.org/governmentAgency`
Range	schema:GovernmentOrganization ^c

downstream water body ^op

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/downstreamWaterBody`
Sub Property Of	nhdplusv2:downstreamWaterBodyTC

upstream water body ^op

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/upstreamWaterBody`

crs ^op

IRI	`http://www.opengis.net/ont/geosparql#crs`
Domain	geo:Geometry

geo ^op

IRI	`https://schema.org/geo`
Domain	schema:Place
Range	schema:GeoCoordinates ^c or schema:GeoShape ^c

distribution ^op

IRI	`https://schema.org/distribution`
Sub Property Of	dcat:distribution
Domain	schema:Dataset
Range	schema:DataDownload

content url ^op

IRI	`https://schema.org/contentUrl`
Sub Property Of	dcat:downloadURL
Range	Resource

publisher ^op

IRI	`https://schema.org/publisher`
Sub Property Of	Publisher ^p

provider ^op

IRI	`https://schema.org/provider`
Sub Property Of	was attributed to ^op

url ^op

IRI	`https://schema.org/url`
Range	Resource

conforms to ^op

IRI	`http://purl.org/dc/terms/conformsTo`
Range	Standard

variable measured ^op

IRI	`https://schema.org/variableMeasured`
Range	geoconnex:MeasuredVariable ^c

measurement technique ^op

IRI	`https://schema.org/measurementTechnique`
Sub Property Of	sosa:usedProcedure

measurement method ^op

IRI	`https://schema.org/measurementMethod`
Sub Property Of	sosa:usedProcedure

has unit ^op

IRI	`http://qudt.org/schema/qudt/hasUnit`
Range	qudt:Unit

has quantity kind ^op

IRI	`http://qudt.org/schema/qudt/hasQuantityKind`
Range	qudt:QuantityKind

frequency ^op

IRI	`http://www.w3.org/ns/ssn/systems/frequency`

linear element ^op

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/linearElement`
Domain	hyf:HY_IndirectPosition ^c
Range	hyf:HY_FlowPath

distance description ^op

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/distanceDescription`
Domain	hyf:HY_IndirectPosition ^c
Range	hyf:HY_DistanceDescription ^c

distance expression ^op

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/distanceExpression`
Domain	hyf:HY_DistanceDescription ^c
Range	hyf:HY_DistanceFromReferent ^c

Datatype Properties

as wkt ^dp

IRI	`http://www.opengis.net/ont/geosparql#asWKT`
Domain	geo:Geometry
Range	geo:wktLiteral

latitude ^dp

IRI	`https://schema.org/latitude`
Domain	schema:GeoCoordinates
Range	xsd:decimal

longitude ^dp

IRI	`https://schema.org/longitude`
Domain	schema:GeoCoordinates
Range	xsd:decimal

elevation ^dp

IRI	`https://schema.org/elevation`
Range	xsd:decimal

polygon ^dp

IRI	`https://schema.org/polygon`
Domain	schema:GeoShape
Range	xsd:string

line ^dp

IRI	`https://schema.org/line`
Domain	schema:GeoShape
Range	xsd:string

coordinates ^dp

IRI	`https://schema.org/coordinates`
Range	xsd:string

encoding format ^dp

IRI	`https://schema.org/encodingFormat`
Range	xsd:string

temporal coverage ^dp

IRI	`https://schema.org/temporalCoverage`
Range	xsd:string

value ^dp

IRI	`https://schema.org/value`
Range	Literal

unit code ^dp

IRI	`https://schema.org/unitCode`
Range	xsd:string

unit text ^dp

IRI	`https://schema.org/unitText`
Range	xsd:string

property id ^dp

IRI	`https://schema.org/propertyID`
Sub Property Of	Identifier ^p

interpolative ^dp

IRI	`https://www.opengis.net/def/schema/hy_features/hyf/interpolative`
Domain	hyf:HY_IndirectPosition ^c
Range	xsd:boolean

Annotation Properties

name ^ap

IRI	`https://schema.org/name`

description ^ap

IRI	`https://schema.org/description`

Namespaces

dcat: http://www.w3.org/ns/dcat#
dcterms: http://purl.org/dc/terms/
geo: http://www.opengis.net/ont/geosparql#
geoconnex: https://geoconnex.us/def/
hyf: https://www.opengis.net/def/schema/hy_features/hyf/
hyf-app: https://www.opengis.net/def/appschema/hy_features/hyf/
hyfo: http://hyfo.spatialai.org/v1/hyfo#
nhdplusv2: http://nhdplusv2.spatialai.org/v1/nhdplusv2#
owl: http://www.w3.org/2002/07/owl#
prov: http://www.w3.org/ns/prov#
qudt: http://qudt.org/schema/qudt/
rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: http://www.w3.org/2000/01/rdf-schema#
schema: https://schema.org/
sf: http://www.opengis.net/ont/sf#
skos: http://www.w3.org/2004/02/skos/core#
sosa: http://www.w3.org/ns/sosa/
ssn-system: http://www.w3.org/ns/ssn/systems/
xsd: http://www.w3.org/2001/XMLSchema#

Legend

^c	Classes
^op	Object Properties
^dp	Datatype Properties
^ap	Annotation Properties

Geoconnex alignment recommendations

Metadata

Classes

Class Hierarchy

Class Definitions

Government Organization c

Organization c

Person c

Search Action c

Entry Point c

Image Object c

Breadcrumb List c

List Item c

Web Site c

Web Page c

News Article c

Property c

Datatype c

Class c

Container Membership Property c

List c

Transitive Property c

Symmetric Property c

Hy_Hydrographic Network c

Measured Variable c

Hy_Indirect Position c

Hy_Distance From Referent c

Hy_Distance Description c

Object Properties

Object Property Hierarchy

Object Property Definitions

logo op

government agency op

downstream water body op

upstream water body op

crs op

geo op

distribution op

content url op

publisher op

provider op

url op

conforms to op

variable measured op

measurement technique op

measurement method op

has unit op

has quantity kind op

frequency op

linear element op

distance description op

distance expression op

Datatype Properties

as wkt dp

latitude dp

longitude dp

elevation dp

polygon dp

line dp

coordinates dp

encoding format dp

temporal coverage dp

value dp

unit code dp

unit text dp

property id dp

interpolative dp

Annotation Properties

name ap

description ap

Namespaces

Legend

Table of Contents

Government Organization ^c

Organization ^c

Person ^c

Search Action ^c

Entry Point ^c

Image Object ^c

Breadcrumb List ^c

List Item ^c

Web Site ^c

Web Page ^c

News Article ^c

Property ^c

Datatype ^c

Class ^c

Container Membership Property ^c

List ^c

Transitive Property ^c

Symmetric Property ^c

Hy_Hydrographic Network ^c

Measured Variable ^c

Hy_Indirect Position ^c

Hy_Distance From Referent ^c

Hy_Distance Description ^c

logo ^op

government agency ^op

downstream water body ^op

upstream water body ^op

crs ^op

geo ^op

distribution ^op

content url ^op

publisher ^op

provider ^op

url ^op

conforms to ^op

variable measured ^op

measurement technique ^op

measurement method ^op

has unit ^op

has quantity kind ^op

frequency ^op

linear element ^op

distance description ^op

distance expression ^op

as wkt ^dp

latitude ^dp

longitude ^dp

elevation ^dp

polygon ^dp

line ^dp

coordinates ^dp

encoding format ^dp

temporal coverage ^dp

value ^dp

unit code ^dp

unit text ^dp

property id ^dp

interpolative ^dp

name ^ap

description ^ap